From the data table pls Answer ONLY the extra credit questio

From the data table pls Answer ONLY the extra credit question!!

***Extra Credit: Comment on the meaning of the average and standard deviation derived in (8)— what does this tell you about your results?

***Extra Credit: Comment on the meaning of the average and standard deviation derived in (8)— what does this tell you about your results?

Solution

From the data table you have provided there is only sample of data of tempered steel. In question 8 it says repeat measurements 10 times for E and sigma_y . I assume you have part 8 solved with you and have the average and standard deviation for samples of tempered steel.

Taking an average over 10 samples for the calculation of E and sigma_y will allow you to eliminate most of the experimental/human errors done while doing the experiment. Generally an average reading is preferred for the same reason as it gives you the best estimate for E and sigma_y.

Looking at your data you can see whether your standard deviation is high or low compared to the average. A high standard deviation means that every time you measured a sample the reading were highly volatile which may show a high amount of experimental error/human error while doing the experiment. A low standard deviation is a good sign for the experiment showing that your measurements where close to one other and proves that you performed your experiment well.